Kepler-41

Kepler-41

Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus
Right ascension	19^h 38^m 03.1747^s[1]
Declination	+45° 58′ 53.877″[1]
Apparent magnitude (V)	14.5[2]
Characteristics
Spectral type	G2V[3]
Astrometry
Radial velocity (Rv)	−27.066±0.008[3] km/s
Proper motion (μ)	RA: 3.001(19) mas/yr[1] Dec.: 2.965(20) mas/yr[1]
Parallax (π)	0.9283 ± 0.0156 mas[1]
Distance	3,510 ± 60 ly (1,080 ± 20 pc)
Details[3]
Mass	1.15±0.04 M☉
Radius	1.29±0.02 R☉
Surface gravity (log g)	4.278±0.005 cgs
Temperature	5750±100 K
Metallicity [Fe/H]	0.38±0.11 dex
Rotational velocity (v sin i)	6±2 km/s
Age	4.4+1.3 −1.1 Gyr
Other designations
KIC 9410930, KOI-196, UCAC3 272-156898, 2MASS J19380317+4558539, Gaia DR2 2080061942886335744[4]
Database references
SIMBAD	data
KIC	data

Kepler-41 or KOI-196 is a star in the constellation Cygnus. It is a G-type main-sequence star, like the Sun, and it is located about 3,510 light-years (1,080 parsecs) away.^[1] It is fairly similar to the Sun, with 115% of its mass, a radius of 129% times that of the Sun, and a surface temperature of 5,750 K.^[3] Search for stellar companions to Kepler-41 in 2013-2014 has yielded inconclusive results, compatible with Kepler-41 being the single star.^[5]

Planetary system

In 2011, the planet Kepler-41b was discovered in orbit around the star. The planet orbits extremely close to Kepler-41, completing an orbit once every 1.86 days. Despite it receiving a high amount of radiation from Kepler-41, the radius of the Kepler-41b was initially believed to be less than that of Jupiter making it unusual for a hot Jupiter however later observations showed an inflated radius similar to other hot jupiters.^[3] Kepler-41b is also quite reflective, with a geometric albedo of 0.30.^[6]

The Kepler-41 planetary system^[3]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.56±0.08 MJ	0.03101±0.0004	1.85555820±0.00000052	0 (fixed)	82.51±0.09°	1.29±0.02 RJ

References

1. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
2. "Notes on Kepler-41 b". Extrasolar Planets Encyclopaedia. Archived from the original on 9 October 2020. Retrieved 21 January 2017.
3. Bonomo, A. S.; et al. (2015). "Improved parameters of seven Kepler giant companions characterized with SOPHIE and HARPS-N". Astronomy and Astrophysics. 575. A85. arXiv:1501.02653. Bibcode:2015A&A...575A..85B. doi:10.1051/0004-6361/201323042. S2CID 119230291.
4. "KOI-952". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 January 2017.
5. Esteves, Lisa J.; Mooij, Ernst J. W. De; Jayawardhana, Ray (2014), "Changing Phases of Alien Worlds: Probing Atmospheres Of Kepler Planets with High-Precision Photometry", The Astrophysical Journal, 804 (2): 150, arXiv:1407.2245, Bibcode:2015ApJ...804..150E, doi:10.1088/0004-637X/804/2/150, S2CID 117798959
6. Santerne, A.; et al. (2011). "SOPHIE velocimetry of Kepler transit candidates IV. KOI-196b: a non-inflated hot Jupiter with a high albedo". Astronomy and Astrophysics. 536. A70. arXiv:1108.0550. Bibcode:2011A&A...536A..70S. doi:10.1051/0004-6361/201117807. S2CID 119025355.